Have been thinking about this so here are some areas of the zoo I would focus on:
c. If South American themed I would keep the scarlet ibis swamp (with renovations) and have the building themed as a flooded forest (so the Monkey House renovation could focus on a dry forest). Anaconda, large turtles, caimans would all have aquatic habitats. Smaller species could include some of the new world monkey species (cotton top tamarins, golden headed lion tamarins), tamandua, tyra and other small species. I do like the Australia area better; but this could work-
d. If South American themed- they could try an outdoor South American area again in the old Rare Animal Range: Jaguar (I know they are supposed to go to Queens), tapir, maned wolf, capybara, flight cages for Andean Condor and King Vultures, outdoor exhibit for the capuchins, add howler monkeys, bush dogs, ocelots, peccaries etc.
e. Or another idea for the old Rare Animal Range...
Monkey House renovation: this would cost a lot of money; but done in the same style (with no wedding venue) like Madagascar. Focus would be on forest corridors including near the Atlantic Coast of Brazil and forest tracts in Central America that are impacted be farming and Urban sprawl. Golden Lion Tamarin, Saki and Titi monkey, pygmy marmosets, silvery marmosets, several bird species, iguana, boa constrictor, possibly a nocturnal section (bats, night monkey, prehensile tailed porcupine, sloth and kinkajou) in a series of 3-4 rooms with immersion and themeing similar in style to Madagascar.
For several years prior to the announcement of Madagascar, the Lion House was supposed to become a flooded forest exhibit. I'm not sure how far the planning for that exhibit progressed (anyone else know?), but using some of the same ideas in the similarly sized Monkey House might work well.